I've been watching this site for more than a year now and have learned much from it. I bought a house in Florida 5 years ago with a mid size gunite pool that had been neglected for years, in fact it was untouched for at least two years. You could say it was a pond when I first saw it. We've brought it back to where it's almost perfect, well worn plaster is the biggest defect now. I had problems with algae until about 9 months ago, even with professionals caring for the pool for the first three years I owned it. It turns-out the primary problem was high (100+) CYA. A secondary problem was a large plaster waterfall structure that I now believe harbored algae inside and out. The pool was drained more than half and the waterfall removed about 9 months ago. After refilling, some tweaks and using only liquid chlorine the water is now perfectly clear and requires little attention. I also had some problems with "green dust" coming from some pool surfaces, that has completely disappeared as well.
My only concern at this point is that the PH tends to rise constantly. I'm putting in about 6 oz of acid each day to hold the PH about 7.5. The odd thing is if left alone the pool PH tends to stabilize at about PH 8.1 and stay there. I have marble chips around the pool coping about 3/4 around the pool and I'm wondering if that may be partially to blame. Any thoughts or suggestions would be greatly appreciated.
My only concern at this point is that the PH tends to rise constantly. I'm putting in about 6 oz of acid each day to hold the PH about 7.5. The odd thing is if left alone the pool PH tends to stabilize at about PH 8.1 and stay there. I have marble chips around the pool coping about 3/4 around the pool and I'm wondering if that may be partially to blame. Any thoughts or suggestions would be greatly appreciated.